Walmart offers the Pyrex 14-Piece Glass Round Storage Box Set, model no. 6022369, for $18.99. Choose in-store pickup to avoid the $4.97 shipping fee. That's the lowest total price we could find by $6, although it was $4 less in December. The dishwasher-safe, non-porous glass set includes four 2-cup rounds, two 4-cup rounds, one 7-cup round, and seven blue plastic storage covers.